Hollis Woman's Club Hollis, NH Other Attractions Beaver Brook Association Hollis, NH Businesses Beaver Brook Association Hollis, NH Businesses Hollis Flea Market Largest Open Air Flea Market in NH. We have 400 + vendors, spread over 15 + acres, large and diverse crowd of shoppers. Open on Sundays April-October 6:00am-- Hollis, NH Other Attractions Overlook Golf Course Hollis, NH Golf Courses